The Betrayers is the tenth novel in the Matt Helm spy series by Donald Hamilton, which originated with Death of a Citizen in 1960. This novel was first published in 1966. It was reissued in 2014 by Ti
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc8151a59dba4a31030ecc5506b59d499dd30c5dc05f753d2f1da4f40dfbff9. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fa1e7ac-d777-4336-a8d2-00f8b6cfdc4b.json and https://artists.proofprofile.net/proofs/artist/9fa1e7ac-d777-4336-a8d2-00f8b6cfdc4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc68b6c112c07886dc271d20f198961f9b1de78056d32178877f5ec81c6495fb. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:37:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1400394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe233ba29f293e4e4b3c248ab3dc9339202568675a84dc8d0cc91156b7546871b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:41:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1400395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c7ba3a35cd3360a5ddb59fdac7925d4262911e73302fd7e36f3db1d5bdc4d7. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48ceb5991ee3129cb0f019c3ff61c3e1f347afe36809edfe46738321cf18c8b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES09S1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc2a2ba0af27cf2f6c9095cf7ae6f08967dd59520f63804d461b01f1fe6ffa3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES09S1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e6e642595acf2f81c7c9f47d130eaf4caee843ebfcef1e8da1437b560b5255. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES09S1500155.